I thought the linebattle went well.
When I lead, the threat of artillery always keeps me behind hills, waiting for friendly regiments to help me move on a position, etc. Skirmishers, in my opinion, are the real "line-mover". If you see a skirmisher unit move up on your left and you're camping atop a hill, then men start dropping, I see that as motivation to get off that f*cking hill, lol. A combined effot of artillery and skirms are an effective way to move lines around if used properly. But given warband's map generation system and a lack of regimental cooperation, it rarely works.
I thought the cavalry was fun and the one round I did lead the 93e we were able to get a nice charge off on the back of a moving line--then the PLG came and cleaned us up xD--and it was fun. It was a disruption of enemy formations and it gave time for friendly infantry to better position themselves to engage.
I personally loved the cavalry and I hope we're able to get it each week because from what I have seen, a single, effective cavalry charge can do what skirmishers and cannon can do together. Of course, it always depends on the situation. The desert map for example; Cavalry was almost rendered useless because the cavalry units attacked prematurely on both sides, getting themselves killed by the grouped up infantry units, and then it turned into "who can shoot better until someone decides to stop waiting". That map was small so it lacked the ability for cavalry maneuvering.
But it was overall a fun battle and a good game.